Calling the ATF\’s tactics appalling, alarming, disturbing and \”almost unimaginable,\” congressional members on Thursday slammed the agency for how it conducted storefront stings across the nation and renewed their demand for answers.

Members of both parties have been demanding answers from the agency and Jones since last January when a Milwaukee Journal Sentinel investigation exposed a series of foul-ups and failures in an ATF sting in Milwaukee dubbed Operation Fearless.

Thursday\’s letter — signed by lawmakers who led the congressional probe into the agency\’s flawed Fast and Furious operation in Arizona — follows an investigation published by the Journal Sentinel in December that detailed how the ATF used rogue tactics in storefront stings across the nation, from Portland, Ore., to Pensacola, Fla.